1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431f4b63d6f249c74bf5674372e1f2276ac6afb98134ab69b18b7abceca5bb26. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18d544e8-aa8d-4e44-b3e6-a0c2db2f12d7.json and https://artists.proofprofile.net/proofs/artist/18d544e8-aa8d-4e44-b3e6-a0c2db2f12d7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Classic Case: The Music of Jethro Tull
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccad32bb07d7c1795df49166b63b5d86463cab33c628b2f6d56c5be228415b9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a26074dc435a4a65d81dd6f809c29688523498e62744171ff0690926591861. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb5c3a6b240d1d05b763afcedc3cafc811b861f713d62d41d77e21b7a2b705e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC18500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac30042de3c4afd1f572ed3d1c4f628e35fe56735b7cbc39e85dad3844646bfc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10001187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763e796766bc2c798752c1cbf34c1408480b316afa968f8aed6d45abb473b682. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10001188.
Too Old to Rock 'N' Roll; Too Young to Die
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5545b2a8b483249714c99502bba91b6ddb5fd5ec3436f91eb2be16a90fda043. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10001189.
Teacher/Bungle in the Jungle/Rainbow Blues/Locomotive Breath
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f2f85a67dcc454de4e8e505ea1f4ae28ee96705a64c10567719cece9f1e39d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10001190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb348d12729ba8eafca7dd2f444963caf8e334d2d855d180c700a8c0b97602a2e. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10001191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1be3ff690bd94f7a358bc7b59155c3a392e12a3cabf7ce9c6db7053da550d0b. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10001192.
The London Symphony Orchestra Plays Jethro Tull/A New Day Yesterday
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccad32bb07d7c1795df49166b63b5d86463cab33c628b2f6d56c5be228415b9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a26074dc435a4a65d81dd6f809c29688523498e62744171ff0690926591861. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb5c3a6b240d1d05b763afcedc3cafc811b861f713d62d41d77e21b7a2b705e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC18500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac30042de3c4afd1f572ed3d1c4f628e35fe56735b7cbc39e85dad3844646bfc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10001187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763e796766bc2c798752c1cbf34c1408480b316afa968f8aed6d45abb473b682. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10001188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5545b2a8b483249714c99502bba91b6ddb5fd5ec3436f91eb2be16a90fda043. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10001189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f2f85a67dcc454de4e8e505ea1f4ae28ee96705a64c10567719cece9f1e39d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10001190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb348d12729ba8eafca7dd2f444963caf8e334d2d855d180c700a8c0b97602a2e. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10001191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1be3ff690bd94f7a358bc7b59155c3a392e12a3cabf7ce9c6db7053da550d0b. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10001192.